Capybara with RSpec - 选择框选项

Question

我将 Capybara 2.4.3 与 Rspec-Rails 3.1.0、Ruby 2.1.5 和 Rails 4.1.8 一起使用。该测试仍然失败：

let(:attack_squad) { create :squad, user: attacker, name: 'Attack Squad' }

scenario 'attacker has available attack squad' do
  visit '/account/battles/new'
  save_and_open_page
  expect(page).to have_select 'Squad', options: [attack_squad.name]
end

使用save_and_open_page，我可以看到正在生成此 HTML：

<select id="battle_squad_id" name="battle[squad_id]">
  <option value="194">Attack Squad</option>
  <option value="192">Default Squad</option>
</select>

这是失败消息：

 Battle Management attacker has available attack squad
 Failure/Error: expect(page).to have_select 'Squad', options: [attack_squad.name]
   expected to find select box "Squad" with options ["Attack Squad"] but there were no matches. Also found "Attack Squad Default Squad", which matched the selector but not all filters.
 # ./spec/features/battle_spec.rb:31:in `block (2 levels) in <top (required)>'
 # -e:1:in `<main>'

我遵循GitHub 上的水豚规范中演示的相同格式。如果我将期望更改为：

expect(page).to have_select 'Squad'

它能够找到选择框并成功通过。如果我将options:值设置为数组以外的任何值，则会出现有关sort方法存在的错误。我缺少什么？

Answer 1

测试选择列表是否存在时，有两个与选项相关的过滤器：

• :options - 这会检查选择列表选项是否与指定的数组完全匹配。
• :with_options - 这会检查选择列表选项是否至少包含指定数组中的选项。

测试失败，因为预期 HTML 不包含“默认小队”选项：

<select id="battle_squad_id" name="battle[squad_id]">
  <option value="194">Attack Squad</option>
</select>

您需要指定所有预期的选项：

let(:attack_squad) { create :squad, user: attacker, name: 'Attack Squad' }
let(:default_squad) { create :squad, user: attacker, name: 'Default Squad' }

scenario 'attacker has available attack squad' do
  visit '/account/battles/new'
  save_and_open_page
  expect(page).to have_select 'Squad', options: [attack_squad.name, default_squad.name]
end

或者，如果您只关心一个选项，请使用 :with_options 过滤器：

let(:attack_squad) { create :squad, user: attacker, name: 'Attack Squad' }

scenario 'attacker has available attack squad' do
  visit '/account/battles/new'
  save_and_open_page
  expect(page).to have_select 'Squad', with_options: [attack_squad.name]
end